import router, { constantRoutes, dynamicRoutes } from '@/router'
import {getRouters} from "@/api/menu";
import auth from '@/plugins/auth'
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView'
const state = {
    routes: [],
    addRoutes: []
}

const mutations = {
    SET_ROUTES: (state, routes) => {
        state.routes = constantRoutes.concat(routes)
        state.addRoutes = routes
    },
    SET_DEFAULT_ROUTES: (state, routes) => {
        state.defaultRoutes = constantRoutes.concat(routes)
    },
    SET_SIDEBAR_ROUTERS: (state, routes) => {
        state.sidebarRouters = routes
    },
}

const actions = {
    GenerateRoutes({ commit }) {
        return new Promise(resolve => {
            getRouters().then(res => {
                // const sdata = JSON.parse(JSON.stringify(res.data))
                const rdata = JSON.parse(JSON.stringify(res.data))
                // const sidebarRoutes = filterAsyncRouter(sdata)
                const rewriteRoutes = filterAsyncRouter(rdata, false, true)
                const asyncRoutes = filterDynamicRoutes(dynamicRoutes);
                // rewriteRoutes.push({ path: '*', redirect: '/404', hidden: true })
                router.addRoutes(asyncRoutes);
                commit('SET_ROUTES', rewriteRoutes)
                // commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
                // commit('SET_DEFAULT_ROUTES', sidebarRoutes)
                // commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
                resolve(rewriteRoutes)
            })

        })
    }
}


// 遍历后台传来的路由字符串，转换为组件对象
// eslint-disable-next-line no-unused-vars
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
    return asyncRouterMap.filter(route => {
        if (type && route.children) {
            route.children = filterChildren(route.children)
        }
        if (route.component) {
            // Layout ParentView 组件特殊处理
            if (route.component === 'Layout') {
                route.component = Layout
            }else if(route.component === 'ParentView') {
                route.component = ParentView
            }else {
                route.component = loadView(route.component)
            }
        }
        if (route.children != null && route.children && route.children.length) {
            route.children = filterAsyncRouter(route.children, route, type)
        } else {
            delete route['children']
            delete route['redirect']
        }
        return true
    })
}

function filterChildren(childrenMap, lastRouter = false) {
    var children = []
    // eslint-disable-next-line no-unused-vars
    childrenMap.forEach((el, index) => {
        if (el.children && el.children.length) {
            if (el.component === 'ParentView' && !lastRouter) {
                el.children.forEach(c => {
                    c.path = el.path + '/' + c.path
                    if (c.children && c.children.length) {
                        children = children.concat(filterChildren(c.children, c))
                        return
                    }
                    children.push(c)
                })
                return
            }
        }
        if (lastRouter) {
            el.path = lastRouter.path + '/' + el.path
        }
        children = children.concat(el)
    })
    return children
}

// 动态路由遍历，验证是否具备权限
export function filterDynamicRoutes(routes) {
    const res = []
    routes.forEach(route => {
        if (route.permissions) {
            if (auth.hasPermiOr(route.permissions)) {
                res.push(route)
            }
        } else if (route.roles) {
            if (auth.hasRoleOr(route.roles)) {
                res.push(route)
            }
        }
    })
    return res
}

export const loadView = (view) => {

    if (process.env.NODE_ENV === 'development') {
        return (resolve) => require([`@/views/${view}`], resolve)
    } else {
        // 使用 import 实现生产环境的路由懒加载
        return () => import(`@/views/${view}`)
    }
}


export default {
    // namespaced: true,
    state,
    mutations,
    actions
}
